While German measles is a bit more dangerous (I had it as a child), mumps/measles/chickenpox seemed to be cause for party time (in the '50s anyway) to get the kids in the neighborhood exposed and over them childhood diseases.
I did recently get a shingles vaccination in hopes I don't have to go through the discomfort in my old age...
Its all fun and games and a party until someone develops meningitis and dies or nearly dies like my brother did in 1961 as a complication of the mumps (and meningitis and encephalitisis are also complications that can develop from having measles and chicken pox not to mention the danger they pose to pregnant women and their babies).
Lets see - he spent several days partying in a coma, the doctors told my parents that even if he came out of it that he might have permanent brain damage, his veins started collapsing, organs started shutting down, was given Last Rites. He did recover and eventually fully recovered but that was after a two month hospital say where he had to re-learn to talk and walk and even feed himself because the meningitis left his brain pretty scrambled. He does have fond memories of wheelchair races in the hospital ward and of the tough but kind hospital administrator who was also a Catholic nun, but not so much about spending his summer once he came home, making up the two months of school work he missed so he could move on to the next grade.
I have the photos of my brother before and after and he doesnt look like the same person. Before healthy, an athlete, even if a bit on the chubby side, rosy cheeks after pale, painfully thin, it took a good year for him to get back to a normal weight and regain muscle strength.
And fortunately even just having the mumps didnt leave him with permanent hearing damage or sterility which while very rare, can occur.
Of course most kids who get measles, mumps or chicken pox will be sick and miserable for a week or so, but for some, it can be deadly:
I did recently get a shingles vaccination in hopes I don't have to go through the discomfort in my old age...
Good for you but also good for others as a person with an active shingles outbreak can transmit full blown chicken pox to unimmunized persons.